Hello, I have been trying to figure out which Frequent Flyer Program I should adopt. I think I want as a goal to try and get lifetime status on United, which I know requires United butt-in-seat miles. My question is whether or not it is possible to fly on United metal but credit miles to another FFP (such as Asiana)? I know that for lifetime miles it's BIS non-award miles, but not sure if one actually has to credit to United Mileage Plus to get credit for lifetime miles...my suspicion is that you do, but would welcome clarification. Thanks!